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Commit 6a28b446 authored by Alexei Starovoitov's avatar Alexei Starovoitov Committed by Daniel Borkmann
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selftests/bpf: adjust test_align expected output 

since verifier started to print liveness state of the registers
adjust expected output of test_align.
Now this test checks for both proper alignment handling by verifier
and correctness of liveness marks.
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent 914cb781
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Showing with 78 additions and 78 deletions
tools/testing/selftests/bpf/test_align.c
View file @ 6a28b446
......@@ -64,11 +64,11 @@ static struct bpf_align_test tests[] = {
.matches = {
{1, "R1=ctx(id=0,off=0,imm=0)"},
{1, "R10=fp0"},
{1, "R3=inv2"},
{2, "R3=inv4"},
{3, "R3=inv8"},
{4, "R3=inv16"},
{5, "R3=inv32"},
{1, "R3_w=inv2"},
{2, "R3_w=inv4"},
{3, "R3_w=inv8"},
{4, "R3_w=inv16"},
{5, "R3_w=inv32"},
},
},
{
......@@ -92,17 +92,17 @@ static struct bpf_align_test tests[] = {
.matches = {
{1, "R1=ctx(id=0,off=0,imm=0)"},
{1, "R10=fp0"},
{1, "R3=inv1"},
{2, "R3=inv2"},
{3, "R3=inv4"},
{4, "R3=inv8"},
{5, "R3=inv16"},
{6, "R3=inv1"},
{7, "R4=inv32"},
{8, "R4=inv16"},
{9, "R4=inv8"},
{10, "R4=inv4"},
{11, "R4=inv2"},
{1, "R3_w=inv1"},
{2, "R3_w=inv2"},
{3, "R3_w=inv4"},
{4, "R3_w=inv8"},
{5, "R3_w=inv16"},
{6, "R3_w=inv1"},
{7, "R4_w=inv32"},
{8, "R4_w=inv16"},
{9, "R4_w=inv8"},
{10, "R4_w=inv4"},
{11, "R4_w=inv2"},
},
},
{
......@@ -121,12 +121,12 @@ static struct bpf_align_test tests[] = {
.matches = {
{1, "R1=ctx(id=0,off=0,imm=0)"},
{1, "R10=fp0"},
{1, "R3=inv4"},
{2, "R3=inv8"},
{3, "R3=inv10"},
{4, "R4=inv8"},
{5, "R4=inv12"},
{6, "R4=inv14"},
{1, "R3_w=inv4"},
{2, "R3_w=inv8"},
{3, "R3_w=inv10"},
{4, "R4_w=inv8"},
{5, "R4_w=inv12"},
{6, "R4_w=inv14"},
},
},
{
......@@ -143,10 +143,10 @@ static struct bpf_align_test tests[] = {
.matches = {
{1, "R1=ctx(id=0,off=0,imm=0)"},
{1, "R10=fp0"},
{1, "R3=inv7"},
{2, "R3=inv7"},
{3, "R3=inv14"},
{4, "R3=inv56"},
{1, "R3_w=inv7"},
{2, "R3_w=inv7"},
{3, "R3_w=inv14"},
{4, "R3_w=inv56"},
},
},
......@@ -185,18 +185,18 @@ static struct bpf_align_test tests[] = {
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.matches = {
{7, "R0=pkt(id=0,off=8,r=8,imm=0)"},
{7, "R3=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{8, "R3=inv(id=0,umax_value=510,var_off=(0x0; 0x1fe))"},
{9, "R3=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{10, "R3=inv(id=0,umax_value=2040,var_off=(0x0; 0x7f8))"},
{11, "R3=inv(id=0,umax_value=4080,var_off=(0x0; 0xff0))"},
{7, "R3_w=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{8, "R3_w=inv(id=0,umax_value=510,var_off=(0x0; 0x1fe))"},
{9, "R3_w=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{10, "R3_w=inv(id=0,umax_value=2040,var_off=(0x0; 0x7f8))"},
{11, "R3_w=inv(id=0,umax_value=4080,var_off=(0x0; 0xff0))"},
{18, "R3=pkt_end(id=0,off=0,imm=0)"},
{18, "R4=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{19, "R4=inv(id=0,umax_value=8160,var_off=(0x0; 0x1fe0))"},
{20, "R4=inv(id=0,umax_value=4080,var_off=(0x0; 0xff0))"},
{21, "R4=inv(id=0,umax_value=2040,var_off=(0x0; 0x7f8))"},
{22, "R4=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{23, "R4=inv(id=0,umax_value=510,var_off=(0x0; 0x1fe))"},
{18, "R4_w=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{19, "R4_w=inv(id=0,umax_value=8160,var_off=(0x0; 0x1fe0))"},
{20, "R4_w=inv(id=0,umax_value=4080,var_off=(0x0; 0xff0))"},
{21, "R4_w=inv(id=0,umax_value=2040,var_off=(0x0; 0x7f8))"},
{22, "R4_w=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{23, "R4_w=inv(id=0,umax_value=510,var_off=(0x0; 0x1fe))"},
},
},
{
......@@ -217,16 +217,16 @@ static struct bpf_align_test tests[] = {
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.matches = {
{7, "R3=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{8, "R4=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{9, "R4=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{10, "R4=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{11, "R4=inv(id=0,umax_value=510,var_off=(0x0; 0x1fe))"},
{12, "R4=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{13, "R4=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{14, "R4=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{15, "R4=inv(id=0,umax_value=2040,var_off=(0x0; 0x7f8))"},
{16, "R4=inv(id=0,umax_value=4080,var_off=(0x0; 0xff0))"},
{7, "R3_w=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{8, "R4_w=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{9, "R4_w=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{10, "R4_w=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{11, "R4_w=inv(id=0,umax_value=510,var_off=(0x0; 0x1fe))"},
{12, "R4_w=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{13, "R4_w=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{14, "R4_w=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{15, "R4_w=inv(id=0,umax_value=2040,var_off=(0x0; 0x7f8))"},
{16, "R4_w=inv(id=0,umax_value=4080,var_off=(0x0; 0xff0))"},
},
},
{
......@@ -257,14 +257,14 @@ static struct bpf_align_test tests[] = {
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.matches = {
{4, "R5=pkt(id=0,off=0,r=0,imm=0)"},
{5, "R5=pkt(id=0,off=14,r=0,imm=0)"},
{6, "R4=pkt(id=0,off=14,r=0,imm=0)"},
{4, "R5_w=pkt(id=0,off=0,r=0,imm=0)"},
{5, "R5_w=pkt(id=0,off=14,r=0,imm=0)"},
{6, "R4_w=pkt(id=0,off=14,r=0,imm=0)"},
{10, "R2=pkt(id=0,off=0,r=18,imm=0)"},
{10, "R5=pkt(id=0,off=14,r=18,imm=0)"},
{10, "R4=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{14, "R4=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff))"},
{15, "R4=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff))"},
{10, "R4_w=inv(id=0,umax_value=255,var_off=(0x0; 0xff))"},
{14, "R4_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff))"},
{15, "R4_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff))"},
},
},
{
......@@ -320,11 +320,11 @@ static struct bpf_align_test tests[] = {
* alignment of 4.
*/
{8, "R2=pkt(id=0,off=0,r=8,imm=0)"},
{8, "R6=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{8, "R6_w=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
/* Offset is added to packet pointer R5, resulting in
* known fixed offset, and variable offset from R6.
*/
{11, "R5=pkt(id=1,off=14,r=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{11, "R5_w=pkt(id=1,off=14,r=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
/* At the time the word size load is performed from R5,
* it's total offset is NET_IP_ALIGN + reg->off (0) +
* reg->aux_off (14) which is 16. Then the variable
......@@ -336,11 +336,11 @@ static struct bpf_align_test tests[] = {
/* Variable offset is added to R5 packet pointer,
* resulting in auxiliary alignment of 4.
*/
{18, "R5=pkt(id=2,off=0,r=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{18, "R5_w=pkt(id=2,off=0,r=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
/* Constant offset is added to R5, resulting in
* reg->off of 14.
*/
{19, "R5=pkt(id=2,off=14,r=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{19, "R5_w=pkt(id=2,off=14,r=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
/* At the time the word size load is performed from R5,
* its total fixed offset is NET_IP_ALIGN + reg->off
* (14) which is 16. Then the variable offset is 4-byte
......@@ -352,18 +352,18 @@ static struct bpf_align_test tests[] = {
/* Constant offset is added to R5 packet pointer,
* resulting in reg->off value of 14.
*/
{26, "R5=pkt(id=0,off=14,r=8"},
{26, "R5_w=pkt(id=0,off=14,r=8"},
/* Variable offset is added to R5, resulting in a
* variable offset of (4n).
*/
{27, "R5=pkt(id=3,off=14,r=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{27, "R5_w=pkt(id=3,off=14,r=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
/* Constant is added to R5 again, setting reg->off to 18. */
{28, "R5=pkt(id=3,off=18,r=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{28, "R5_w=pkt(id=3,off=18,r=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
/* And once more we add a variable; resulting var_off
* is still (4n), fixed offset is not changed.
* Also, we create a new reg->id.
*/
{29, "R5=pkt(id=4,off=18,r=0,umax_value=2040,var_off=(0x0; 0x7fc))"},
{29, "R5_w=pkt(id=4,off=18,r=0,umax_value=2040,var_off=(0x0; 0x7fc))"},
/* At the time the word size load is performed from R5,
* its total fixed offset is NET_IP_ALIGN + reg->off (18)
* which is 20. Then the variable offset is (4n), so
......@@ -410,11 +410,11 @@ static struct bpf_align_test tests[] = {
* alignment of 4.
*/
{8, "R2=pkt(id=0,off=0,r=8,imm=0)"},
{8, "R6=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{8, "R6_w=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
/* Adding 14 makes R6 be (4n+2) */
{9, "R6=inv(id=0,umin_value=14,umax_value=1034,var_off=(0x2; 0x7fc))"},
{9, "R6_w=inv(id=0,umin_value=14,umax_value=1034,var_off=(0x2; 0x7fc))"},
/* Packet pointer has (4n+2) offset */
{11, "R5=pkt(id=1,off=0,r=0,umin_value=14,umax_value=1034,var_off=(0x2; 0x7fc))"},
{11, "R5_w=pkt(id=1,off=0,r=0,umin_value=14,umax_value=1034,var_off=(0x2; 0x7fc))"},
{13, "R4=pkt(id=1,off=4,r=0,umin_value=14,umax_value=1034,var_off=(0x2; 0x7fc))"},
/* At the time the word size load is performed from R5,
* its total fixed offset is NET_IP_ALIGN + reg->off (0)
......@@ -426,11 +426,11 @@ static struct bpf_align_test tests[] = {
/* Newly read value in R6 was shifted left by 2, so has
* known alignment of 4.
*/
{18, "R6=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{18, "R6_w=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
/* Added (4n) to packet pointer's (4n+2) var_off, giving
* another (4n+2).
*/
{19, "R5=pkt(id=2,off=0,r=0,umin_value=14,umax_value=2054,var_off=(0x2; 0xffc))"},
{19, "R5_w=pkt(id=2,off=0,r=0,umin_value=14,umax_value=2054,var_off=(0x2; 0xffc))"},
{21, "R4=pkt(id=2,off=4,r=0,umin_value=14,umax_value=2054,var_off=(0x2; 0xffc))"},
/* At the time the word size load is performed from R5,
* its total fixed offset is NET_IP_ALIGN + reg->off (0)
......@@ -473,11 +473,11 @@ static struct bpf_align_test tests[] = {
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = REJECT,
.matches = {
{4, "R5=pkt(id=0,off=0,r=0,imm=0)"},
{4, "R5_w=pkt(id=0,off=0,r=0,imm=0)"},
/* ptr & 0x40 == either 0 or 0x40 */
{5, "R5=inv(id=0,umax_value=64,var_off=(0x0; 0x40))"},
{5, "R5_w=inv(id=0,umax_value=64,var_off=(0x0; 0x40))"},
/* ptr << 2 == unknown, (4n) */
{7, "R5=inv(id=0,smax_value=9223372036854775804,umax_value=18446744073709551612,var_off=(0x0; 0xfffffffffffffffc))"},
{7, "R5_w=inv(id=0,smax_value=9223372036854775804,umax_value=18446744073709551612,var_off=(0x0; 0xfffffffffffffffc))"},
/* (4n) + 14 == (4n+2). We blow our bounds, because
* the add could overflow.
*/
......@@ -485,7 +485,7 @@ static struct bpf_align_test tests[] = {
/* Checked s>=0 */
{10, "R5=inv(id=0,umin_value=2,umax_value=9223372036854775806,var_off=(0x2; 0x7ffffffffffffffc))"},
/* packet pointer + nonnegative (4n+2) */
{12, "R6=pkt(id=1,off=0,r=0,umin_value=2,umax_value=9223372036854775806,var_off=(0x2; 0x7ffffffffffffffc))"},
{12, "R6_w=pkt(id=1,off=0,r=0,umin_value=2,umax_value=9223372036854775806,var_off=(0x2; 0x7ffffffffffffffc))"},
{14, "R4=pkt(id=1,off=4,r=0,umin_value=2,umax_value=9223372036854775806,var_off=(0x2; 0x7ffffffffffffffc))"},
/* NET_IP_ALIGN + (4n+2) == (4n), alignment is fine.
* We checked the bounds, but it might have been able
......@@ -530,11 +530,11 @@ static struct bpf_align_test tests[] = {
* alignment of 4.
*/
{7, "R2=pkt(id=0,off=0,r=8,imm=0)"},
{9, "R6=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{9, "R6_w=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
/* Adding 14 makes R6 be (4n+2) */
{10, "R6=inv(id=0,umin_value=14,umax_value=1034,var_off=(0x2; 0x7fc))"},
{10, "R6_w=inv(id=0,umin_value=14,umax_value=1034,var_off=(0x2; 0x7fc))"},
/* New unknown value in R7 is (4n) */
{11, "R7=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
{11, "R7_w=inv(id=0,umax_value=1020,var_off=(0x0; 0x3fc))"},
/* Subtracting it from R6 blows our unsigned bounds */
{12, "R6=inv(id=0,smin_value=-1006,smax_value=1034,var_off=(0x2; 0xfffffffffffffffc))"},
/* Checked s>= 0 */
......@@ -583,15 +583,15 @@ static struct bpf_align_test tests[] = {
* alignment of 4.
*/
{7, "R2=pkt(id=0,off=0,r=8,imm=0)"},
{10, "R6=inv(id=0,umax_value=60,var_off=(0x0; 0x3c))"},
{10, "R6_w=inv(id=0,umax_value=60,var_off=(0x0; 0x3c))"},
/* Adding 14 makes R6 be (4n+2) */
{11, "R6=inv(id=0,umin_value=14,umax_value=74,var_off=(0x2; 0x7c))"},
{11, "R6_w=inv(id=0,umin_value=14,umax_value=74,var_off=(0x2; 0x7c))"},
/* Subtracting from packet pointer overflows ubounds */
{13, "R5=pkt(id=1,off=0,r=8,umin_value=18446744073709551542,umax_value=18446744073709551602,var_off=(0xffffffffffffff82; 0x7c))"},
{13, "R5_w=pkt(id=1,off=0,r=8,umin_value=18446744073709551542,umax_value=18446744073709551602,var_off=(0xffffffffffffff82; 0x7c))"},
/* New unknown value in R7 is (4n), >= 76 */
{15, "R7=inv(id=0,umin_value=76,umax_value=1096,var_off=(0x0; 0x7fc))"},
{15, "R7_w=inv(id=0,umin_value=76,umax_value=1096,var_off=(0x0; 0x7fc))"},
/* Adding it to packet pointer gives nice bounds again */
{16, "R5=pkt(id=2,off=0,r=0,umin_value=2,umax_value=1082,var_off=(0x2; 0x7fc))"},
{16, "R5_w=pkt(id=2,off=0,r=0,umin_value=2,umax_value=1082,var_off=(0x2; 0x7fc))"},
/* At the time the word size load is performed from R5,
* its total fixed offset is NET_IP_ALIGN + reg->off (0)
* which is 2. Then the variable offset is (4n+2), so
......
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